Reacción a "Reactions: pandemic caused educational delays equivalent to a third of the academic year"

The press release reflects quite accurately the results of the research published in the article. The language used is of course informative and simple, but respects the content of the research. 

The study is carried out by researchers from excellent institutions. It is quality research, which meets all the standards required for research of this type. The approach is very interesting and the methodology has been designed and executed with precision. The conclusions are based on rigorously conducted analyses and solid data. 

As it is a meta-analysis, its value lies precisely in analysing a whole set of studies on this topic, so it summarises well the state of the art. It is in line with the few studies on the impact of the pandemic on learning, which point to a loss in learning, especially for students of lower socio-economic status. 

As it is a meta-analysis, and well executed, it excludes research that may have a significant level of bias. The limitations to be taken into account are that the meta-analysis is based on studies that have already been conducted, and therefore the limitations it has are those of integrated studies. As noted in the article, few analyses have been conducted in low-income countries. 

From this evidence we know that the pandemic and its implications (closure of educational institutions, online and hybrid teaching) have had a negative impact on students, especially those from lower socio-economic backgrounds. Furthermore, we know that contrary to what was thought, students of all educational levels have been equally affected. This result is evidence that face-to-face education in educational institutions is more effective than distance education, whether online or hybrid. It is also evidence that face-to-face education in schools and universities compensates for the unequal background of students. The results of this research point to measures to compensate for this learning loss, which is carried over time, especially for more vulnerable groups of students.